10 AOP的註解配置

首先在因為要使用到掃瞄功能，所以xml的標頭檔案中除了引入bean和aop之外，還要引入context才行：

<?xml version="1.0" encoding="utf-8"?>

...    

<?xml

version="1.0" encoding="utf-8"?>

<

beans
xmlns=""

xmlns:xsi=""

xmlns:context=""

xmlns:aop=""

xsi:schemalocation="

/spring-beans.xsd

/spring-aop.xsd

/spring-context.xsd"

>

...

beans
>

既然使用註解，那麼在配置檔案中需要開啟掃瞄配置以註冊bean元件；同時spring中使用了aspectj包的@aspect註解標註當前元件為切面，所以同時還需要在配置檔案中配置實用aspectj的自動**模式。如下：

1

<

context:component-scan
base-package="dulk.learn"
>
context:component-scan
>

<

aop:aspectj-autoproxy
>
aop:aspectj-autoproxy
>

aop的註解配置方式，對於乙個類來說：

import org.aspectj.lang.joinpoint;

import org.aspectj.lang.proceedingjoinpoint;
import org.aspectj.lang.annotation.after;
import org.aspectj.lang.annotation.afterreturning;
import org.aspectj.lang.annotation.afterthrowing;
import org.aspectj.lang.annotation.around;
import org.aspectj.lang.annotation.aspect;
import org.aspectj.lang.annotation.before;
import org.springframework.stereotype.component;
@component
@aspect
public class section 
@afterreturning(pointcut = "execution(* dulk.learn..*.*(..))", returning = "ret")
public void doafterreturning(joinpoint point, object ret) 
@afterthrowing(pointcut = "execution(* dulk.learn..*.*(..))", throwing = "e")
public void dothrow(joinpoint point, throwable e) 
@after("execution(* dulk.learn..*.*(..))")
public void doafter() 
@around("execution(* dulk.learn..*.*(..))")
public void doaround(proceedingjoinpoint point)  catch (throwable throwable) 
system.out.println("doaround-doafter");
}}

x

49

import

org.aspectj.lang.joinpoint;

import

org.aspectj.lang.proceedingjoinpoint;

import

org.aspectj.lang.annotation.after;

import

org.aspectj.lang.annotation.afterreturning;

import

org.aspectj.lang.annotation.afterthrowing;

import

org.aspectj.lang.annotation.around;

import

org.aspectj.lang.annotation.aspect;

import

org.aspectj.lang.annotation.before;

import

org.springframework.stereotype.component;

@component

@aspect

public

class
section

@afterreturning(pointcut

="execution(* dulk.learn..*.*(..))", returning
="ret")

public

void
doafterreturning(joinpoint
point, object
ret)

@afterthrowing(pointcut

="execution(* dulk.learn..*.*(..))", throwing
="e")

public

void
dothrow(joinpoint
point, throwable
e)

@after("execution(* dulk.learn..*.*(..))")

public

void
doafter()

@around("execution(* dulk.learn..*.*(..))")

public

void
doaround(proceedingjoinpoint
point)  catch (throwable
throwable)

system.out.println("doaround-doafter");

}

}

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